Nut-lock.



E. L. MINNIG.

-NUT Loox.

' y PPPPP 0A IIIIIIIIII ov.16,1911. 1,024,805. Patented Apr. 30, 1912'.

ELMER L. MINNG, 0F HARRISBURG, PENNSYLVANIA.

NUT-LOCK.

Specification of Letters Patent.

Patented Apr. 30, 1912.

Application filed November 16, 1911. Serial No. 660,715.

To all rwhom it may concern.'

Be it known that I, ELMER L. MiNNrG, a citizen of the United States,residing at Harrisburg, in the county of Dauphin and State ofPennsylvania, have invented certain new and useful Improvements in Nut-Locls, of which the following is a specification.

This invention relates to improvements in nut locks, its primary objectbeing to provide means cooperating with the holding nut which willautomatically engage with the threads of a bolt to bind said nut inposition, any unauthorized oH-turning of the nut tending to increase thebinding action aforesaid.

Specifically, my invention comprises a peculiar form of locking meansdesigned particularly with a view to afford increased wedging actionwhen adjusted in its operative position between said locking means andthe threads ofthe bolt to which the nut may be applied, the advantagesof the construction and arrangement of the parts being hereinafter morefully described, claimed and illustrated in the drawings, wherein Figurel is a perspective view of the holding nut with my invention appliedthereto; Fig. 2 is a top plan view of the nut showing the manner ofreleasing the locking member by a wrench applied thereto; Fig. 3 is aside elevation of my invention applied to a bolt; and Fig. 4 is a detailview of the locking member. Fig. 5 is an enlarged end view of thelocking pawl alone, showing more clearly the beveled cam portion of thesame.

Referring now to the drawings, 1 designates a bolt having a threaded end2, upon which is adapted to be screwed the holding nut 3.

4 designates the pawl which, for the purpose of description, I will calla locking member, and which is eccentrically mounted on a pin 5projecting from the upper face or side of the nut 3 and passing throughan aperture 5 in the said locking member. The member 4 is peculiarlyshaped and its inner end forms a thread engaging cam 6 having its edgebeveled transversely on opposite sides thereof and longitudinallyinclined with respect to the threads of the bolt, as clearly shown inFig. 5 of the drawings. The action and advantages of this feature willbe apparent, Jfor when the said cam is in engagement with the threads ofthe bolt 1, any unauthorized ott-turning or unscrewing of the nut 3 willtend to draw the member 4 in the direction of the arrow in Fig. l, thelongitudinal incline of said cam portion constituting a wedge to preventsuch movement. In addition to the foregoing, the particular constructionof the member 4 permits it to be used in connection with bolts ofvarying sized threads where the dual functio-n thereof, that of tendencyby` transverse engagement with the threads to resist unscrewing actionand that of forming a wedge between the threads themselves and therebydoubly insuring immediate o-peration of the pawl 4, will be equallysubserved.

Mounted on the pin 5 is a spiral spring 7, the upper extremity of whichis secured to the pin and the lower end being received by an aperture 7in the locking member 4. The tendency of this spring is to hold thelocking member 7 in normal operative position, automatically engagingwith the threads of the bolt l as the nut 3 is screwed thereon.

The outer end portion of the locking member 4 constitutes a projection 8extending over the edge of the nut 3 for ready engagement by a wrench 9when it is desired to release and remove the nut. y The action ofreleasing the locking member and removing the nut may be simultaneous,as will be apparent from the foregoing. In placing the nut in posit-ionon the bolt l, the locking member will be in operative position and thebinding action may be assisted by tapping the outer projection 8 topreyent any loosening of the nut 3 from the olt.

Having thus fully described the invention, what is claimed as new is l.In a nut lock, the combination of a threaded bolt, a nut adapted to bescrewed thereon, and a locking member mounted on said nut comprising acam having a thread engaging portion transversely beveled andlongitudinally inclined with respect to the threads of the bolt.

2. `In a nut lock, the combination of a threaded bolt, a nut adapted tobe screwed thereon, a pin projecting from the said nut, a pawleccentrically mounted on the pin, the inner end of said pawl comprisinga Wedge-shaped thread engaging cam, said and secured to the pawl to holdthe same in calm being transversely beveled from opponormal operatlveposition.

l0 site sides thereof whereby unauthorized In testimony whereof I affixmy signaunserewng of the nut tends to Wedge said ture n presence of twowitnesses. cam into the threads, the outer end of the ELMER L. MINNIG-`pawl constituting a projection for engage- Witnesses: ment With a Wrenchto release said pawl, Jol-IN B. VELSH, i and a spring mounted on the pinaforesaid Mrs. C. F. HOLTZMAN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, ID. C.

